/* $Id: gt64240eth.h.rca 1.1 Tue Mar 11 10:39:26 2003 doucett1 Experimental $
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2001 Patton Electronics Company
 * Copyright (C) 2002 Momentum Computer
 *
 * Copyright 2000 MontaVista Software Inc.
 * Author: MontaVista Software, Inc.
 *         	stevel@mvista.com or support@mvista.com
 *
 * ########################################################################
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * ########################################################################
 *
 * Ethernet driver definitions for the MIPS GT96100 Advanced
 * Communication Controller.
 * 
 * Modified for the Marvellous GT64240 Retarded Communication Controller.
 *
 */
#ifndef _GT64240ETH_H
#define _GT64240ETH_H

#include "../../arch/mips/momentum/ocelot_g/gt64240.h"

#define ETHERNET_PORTS_DIFFERENCE_OFFSETS	0x400

/* Translate those weanie names from Galileo/VxWorks header files: */

#define GT64240_MRR                    MAIN_ROUTING_REGISTER
#define GT64240_CIU_ARBITER_CONFIG     COMM_UNIT_ARBITER_CONFIGURATION_REGISTER
#define GT64240_CIU_ARBITER_CONTROL    COMM_UNIT_ARBITER_CONTROL
#define GT64240_MAIN_LOW_CAUSE         LOW_INTERRUPT_CAUSE_REGISTER
#define GT64240_MAIN_HIGH_CAUSE        HIGH_INTERRUPT_CAUSE_REGISTER
#define GT64240_CPU_LOW_MASK           CPU_INTERRUPT_MASK_REGISTER_LOW
#define GT64240_CPU_HIGH_MASK          CPU_INTERRUPT_MASK_REGISTER_HIGH
#define GT64240_CPU_SELECT_CAUSE       CPU_SELECT_CAUSE_REGISTER

#define GT64240_ETH_PHY_ADDR_REG       ETHERNET_PHY_ADDRESS_REGISTER
#define GT64240_ETH_PORT_CONFIG        ETHERNET0_PORT_CONFIGURATION_REGISTER
#define GT64240_ETH_PORT_CONFIG_EXT    ETHERNET0_PORT_CONFIGURATION_EXTEND_REGISTER
#define GT64240_ETH_PORT_COMMAND       ETHERNET0_PORT_COMMAND_REGISTER
#define GT64240_ETH_PORT_STATUS        ETHERNET0_PORT_STATUS_REGISTER
#define GT64240_ETH_IO_SIZE            ETHERNET_PORTS_DIFFERENCE_OFFSETS
#define GT64240_ETH_SMI_REG            ETHERNET_SMI_REGISTER
#define GT64240_ETH_MIB_COUNT_BASE     ETHERNET0_MIB_COUNTER_BASE
#define GT64240_ETH_SDMA_CONFIG        ETHERNET0_SDMA_CONFIGURATION_REGISTER
#define GT64240_ETH_SDMA_COMM          ETHERNET0_SDMA_COMMAND_REGISTER
#define GT64240_ETH_INT_MASK           ETHERNET0_INTERRUPT_MASK_REGISTER
#define GT64240_ETH_INT_CAUSE          ETHERNET0_INTERRUPT_CAUSE_REGISTER
#define GT64240_ETH_CURR_TX_DESC_PTR0  ETHERNET0_CURRENT_TX_DESCRIPTOR_POINTER0
#define GT64240_ETH_CURR_TX_DESC_PTR1  ETHERNET0_CURRENT_TX_DESCRIPTOR_POINTER1
#define GT64240_ETH_1ST_RX_DESC_PTR0   ETHERNET0_FIRST_RX_DESCRIPTOR_POINTER0
#define GT64240_ETH_CURR_RX_DESC_PTR0  ETHERNET0_CURRENT_RX_DESCRIPTOR_POINTER0
#define GT64240_ETH_HASH_TBL_PTR       ETHERNET0_HASH_TABLE_POINTER_REGISTER

/* Turn on NAPI by default */

#define	GT64240_NAPI			1

/* Some 64240 settings that SHOULD eventually be setup in PROM monitor: */
/* (Board-specific to the DSL3224 Rev A board ONLY!)                    */
#define D3224_MPP_CTRL0_SETTING		0x66669900
#define D3224_MPP_CTRL1_SETTING		0x00000000
#define D3224_MPP_CTRL2_SETTING		0x00887700
#define D3224_MPP_CTRL3_SETTING		0x00000044
#define D3224_GPP_IO_CTRL_SETTING	0x0000e800
#define D3224_GPP_LEVEL_CTRL_SETTING	0xf001f703
#define D3224_GPP_VALUE_SETTING		0x00000000

/* Keep the ring sizes a power of two for efficiency. */
//-#define TX_RING_SIZE	16
#define TX_RING_SIZE	64	/* TESTING !!! */
#define RX_RING_SIZE	32
#define PKT_BUF_SZ	1536	/* Size of each temporary Rx buffer.*/

#define RX_HASH_TABLE_SIZE 16384
#define HASH_HOP_NUMBER 12

#define NUM_INTERFACES 3

#define GT64240ETH_TX_TIMEOUT HZ/4

#define MIPS_GT64240_BASE 0xf4000000
#define GT64240_ETH0_BASE (MIPS_GT64240_BASE + GT64240_ETH_PORT_CONFIG)
#define GT64240_ETH1_BASE (GT64240_ETH0_BASE + GT64240_ETH_IO_SIZE)
#define GT64240_ETH2_BASE (GT64240_ETH1_BASE + GT64240_ETH_IO_SIZE)

#if defined(CONFIG_MIPS_DSL3224)
#define GT64240_ETHER0_IRQ 4
#define GT64240_ETHER1_IRQ 4
#else
#define GT64240_ETHER0_IRQ -1
#define GT64240_ETHER1_IRQ -1
#endif

#define REV_GT64240  0x1
#define REV_GT64240A 0x10

#define GT64240ETH_READ(gp, offset) \
    GT_READ_DATA((gp)->port_offset + (offset))

#define GT64240ETH_WRITE(gp, offset, data) \
    GT_WRITE((gp)->port_offset + (offset), (data))

#define GT64240ETH_SETBIT(gp, offset, bits) \
    GT64240ETH_WRITE((gp), (offset), GT64240ETH_READ((gp), (offset)) | (bits))

#define GT64240ETH_CLRBIT(gp, offset, bits) \
    GT64240ETH_WRITE((gp), (offset), GT64240ETH_READ((gp), (offset)) & ~(bits))

#define GT64240_WRITE(ofs, data)	GT_WRITE((ofs), (data))

#define GT64240_READ(ofs)		GT_READ_DATA((ofs))

/* Bit definitions of the SMI Reg */
enum {
    smirDataMask = 0xffff,
    smirPhyAdMask = 0x1f<<16,
    smirPhyAdBit = 16,
    smirRegAdMask = 0x1f<<21,
    smirRegAdBit = 21,
    smirOpCode = 1<<26,
    smirReadValid = 1<<27,
    smirBusy = 1<<28
};

/* Bit definitions of the Port Config Reg */
enum pcr_bits {
    pcrPM = 1 << 0,
    pcrRBM = 1 << 1,
    pcrPBF = 1 << 2,
    pcrEN = 1 << 7,
    pcrLPBKMask = 0x3<<8,
    pcrLPBKBit = 1 << 8,
    pcrFC = 1<<10,
    pcrHS = 1<<12,
    pcrHM = 1<<13,
    pcrHDM = 1<<14,
    pcrHD = 1<<15,
    pcrISLMask = 0x7<<28,
    pcrISLBit = 28,
    pcrACCS = 1<<31
};

/* Bit definitions of the Port Config Extend Reg */
enum pcxr_bits {
    pcxrIGMP = 1,
    pcxrSPAN = 2,
    pcxrPAR = 4,
    pcxrPRIOtxMask = 0x7<<3,
    pcxrPRIOtxBit = 3,
    pcxrPRIOrxMask = 0x3<<6,
    pcxrPRIOrxBit = 6,
    pcxrPRIOrxOverride = 1<<8,
    pcxrDPLXen = 1<<9,
    pcxrFCTLen = 1<<10,
    pcxrFLP = 1<<11,
    pcxrFCTL = 1<<12,
    pcxrMFLMask = 0x3<<14,
    pcxrMFLBit = 14,
    pcxrMIBclrMode = 1<<16,
    pcxrSpeed = 1<<18,
    pcxrSpeeden = 1<<19,
    pcxrRMIIen = 1<<20,
    pcxrDSCPen = 1<<21
};

/* Bit definitions of the Port Command Reg */
enum pcmr_bits {
    pcmrFJ = 1<<15
};


/* Bit definitions of the Port Status Reg */
enum psr_bits {
    psrSpeed = 1,
    psrDuplex = 2,
    psrFctl = 4,
    psrLink = 8,
    psrPause = 1<<4,
    psrTxLow = 1<<5,
    psrTxHigh = 1<<6,
    psrTxInProg = 1<<7
};

/* Bit definitions of the SDMA Config Reg */
enum sdcr_bits {
    sdcrRCMask = 0xf<<2,
    sdcrRCBit = 2,
    sdcrBLMR = 1<<6,
    sdcrBLMT = 1<<7,
    sdcrPOVR = 1<<8,
    sdcrRIFB = 1<<9,
    sdcrBSZMask = 0x3<<12,
    sdcrBSZBit = 12
};

/* Bit definitions of the SDMA Command Reg */
enum sdcmr_bits {
    sdcmrERD = 1<<7,
    sdcmrAR = 1<<15,
    sdcmrSTDH = 1<<16,
    sdcmrSTDL = 1<<17,
    sdcmrTXDH = 1<<23,
    sdcmrTXDL = 1<<24,
    sdcmrAT = 1<<31
};

/* Bit definitions of the Interrupt Cause Reg */
enum icr_bits {
    icrRxBuffer = 1,
    icrTxBufferHigh = 1<<2,
    icrTxBufferLow = 1<<3,
    icrTxEndHigh = 1<<6,
    icrTxEndLow = 1<<7,
    icrRxError = 1<<8,
    icrTxErrorHigh = 1<<10,
    icrTxErrorLow = 1<<11,
    icrRxOVR = 1<<12,
    icrTxUdr = 1<<13,
    icrRxBufferQ0 = 1<<16,
    icrRxBufferQ1 = 1<<17,
    icrRxBufferQ2 = 1<<18,
    icrRxBufferQ3 = 1<<19,
    icrRxErrorQ0 = 1<<20,
    icrRxErrorQ1 = 1<<21,
    icrRxErrorQ2 = 1<<22,
    icrRxErrorQ3 = 1<<23,
    icrMIIPhySTC = 1<<28,
    icrSMIdone = 1<<29,
    icrEtherIntSum = 1<<31
};


/* The Rx and Tx descriptor lists. */
#ifdef __LITTLE_ENDIAN
typedef struct {
    u32 cmdstat;
    u16 reserved;  //-prk21aug01    u32 reserved:16;
    u16 byte_cnt;  //-prk21aug01    u32 byte_cnt:16;
    u32 buff_ptr;
    u32 next;
} gt64240_td_t;

typedef struct {
    u32 cmdstat;
    u16 byte_cnt;  //-prk21aug01    u32 byte_cnt:16;
    u16 buff_sz;   //-prk21aug01    u32 buff_sz:16;
    u32 buff_ptr;
    u32 next;
} gt64240_rd_t;
#elif defined(__BIG_ENDIAN)
typedef struct {
    u16 byte_cnt;  //-prk21aug01    u32 byte_cnt:16;
    u16 reserved;  //-prk21aug01    u32 reserved:16;
    u32 cmdstat;
    u32 next;
    u32 buff_ptr;
} gt64240_td_t;

typedef struct {
    u16 buff_sz;   //-prk21aug01    u32 buff_sz:16;
    u16 byte_cnt;  //-prk21aug01    u32 byte_cnt:16;
    u32 cmdstat;
    u32 next;
    u32 buff_ptr;
} gt64240_rd_t;
#else
#error Either __BIG_ENDIAN or __LITTLE_ENDIAN must be defined!
#endif


/* Values for the Tx command-status descriptor entry. */
enum td_cmdstat {
    txOwn = 1<<31,
    txAutoMode = 1<<30,
    txEI = 1<<23,
    txGenCRC = 1<<22,
    txPad = 1<<18,
    txFirst = 1<<17,
    txLast = 1<<16,
    txErrorSummary = 1<<15,
    txReTxCntMask = 0x0f<<10,
    txReTxCntBit = 10,
    txCollision = 1<<9,
    txReTxLimit = 1<<8,
    txUnderrun = 1<<6,
    txLateCollision = 1<<5
};


/* Values for the Rx command-status descriptor entry. */
enum rd_cmdstat {
    rxOwn = 1<<31,
    rxAutoMode = 1<<30,
    rxEI = 1<<23,
    rxFirst = 1<<17,
    rxLast = 1<<16,
    rxErrorSummary = 1<<15,
    rxIGMP = 1<<14,
    rxHashExpired = 1<<13,
    rxMissedFrame = 1<<12,
    rxFrameType = 1<<11,
    rxShortFrame = 1<<8,
    rxMaxFrameLen = 1<<7,
    rxOverrun = 1<<6,
    rxCollision = 1<<4,
    rxCRCError = 1
};

/* Bit fields of a Hash Table Entry */
enum hash_table_entry {
    hteValid = 1,
    hteSkip = 2,
    hteRD = 4
};

// The MIB counters
typedef struct {
    u32 byteReceived;
    u32 byteSent;
    u32 framesReceived;
    u32 framesSent;
    u32 totalByteReceived;
    u32 totalFramesReceived;
    u32 broadcastFramesReceived;
    u32 multicastFramesReceived;
    u32 cRCError;
    u32 oversizeFrames;
    u32 fragments;
    u32 jabber;
    u32 collision;
    u32 lateCollision;
    u32 frames64;
    u32 frames65_127;
    u32 frames128_255;
    u32 frames256_511;
    u32 frames512_1023;
    u32 frames1024_MaxSize;
    u32 macRxError;
    u32 droppedFrames;
    u32 outMulticastFrames;
    u32 outBroadcastFrames;
    u32 undersizeFrames;
} mib_counters_t;


struct gt64240_private {
    gt64240_rd_t* rx_ring;
    gt64240_td_t* tx_ring;
    // The Rx and Tx rings must be 16-byte aligned
    dma_addr_t rx_ring_dma;
    dma_addr_t tx_ring_dma;
    char* hash_table;
    // The Hash Table must be 8-byte aligned
    dma_addr_t hash_table_dma;
    int hash_mode;
    
    // The Rx buffers must be 8-byte aligned
    char* rx_buff;
    dma_addr_t rx_buff_dma;
    // Tx buffers (tx_skbuff[i]->data) with less than 8 bytes
    // of payload must be 8-byte aligned
    struct sk_buff* tx_skbuff[TX_RING_SIZE];
    int rx_next_out;	/* The next free ring entry to receive */
    int tx_next_in;	/* The next free ring entry to send */
    int tx_next_out;	/* The last ring entry the ISR processed */
    int tx_count;       /* current # of pkts waiting to be sent in Tx ring */
    int intr_work_done; /* number of Rx and Tx pkts processed in the isr */
    int tx_full;        /* Tx ring is full */
    
    mib_counters_t mib;
    struct net_device_stats stats;

    int io_size;
    int port_num;  // 0 or 1
    int chip_rev;
    u32 port_offset;
    
    int phy_addr; // PHY address
    u32 last_psr; // last value of the port status register

    int options;           /* User-settable misc. driver options. */
    int drv_flags;
    spinlock_t lock;	   /* Serialise access to device */
    struct mii_if_info mii_if;
};

#endif /* _GT64240ETH_H */
